WO2019163585A1

WO2019163585A1 - Elastic fiber treatment agent and use thereof

Info

Publication number: WO2019163585A1
Application number: PCT/JP2019/004922
Authority: WO
Inventors: 和史安永; 幹生中川
Original assignee: 松本油脂製薬株式会社
Priority date: 2018-02-22
Filing date: 2019-02-13
Publication date: 2019-08-29
Also published as: JPWO2019163585A1; JP7296360B2

Abstract

Provided are: an elastic fiber treatment agent capable of imparting both excellent anti-sticking properties to fibers in the inner layer of a fiber package, and excellent anti-rolling properties to the outer layer of the fiber package; and an elastic fiber treated with said treatment agent. The elastic fiber treatment agent contains: at least one base component (A) selected from among mineral oil (A1), silicone oil (A2), and ester oil (A3); and component (B) which is a basic alkaline earth metal sulfonate. The sulfonic acid constituting component (B) is preferably an alkyl aromatic sulfonic acid having an average molecular weight of 350-700 g/mol. The total base number of component (B) is preferably 1-700 KOH mg/g.

Description

Treatment agent for elastic fiber and use thereof

The present invention relates to an elastic fiber treatment agent and an elastic fiber to which the treatment agent is applied.

In the spinning process, the elastic fiber is wound into a cheese shape after applying the treatment agent, and becomes a stringed body (hereinafter sometimes referred to as cheese). The elastic fiber is a fiber that is easily stuck because it has viscoelasticity. In particular, in the inner layer portion of the thread body, the sticking progresses with time due to the pressure applied during winding. Therefore, when using an elastic fiber thread body, unwinding is poor and thread breakage is caused. In order to improve this unwinding failure, various treatment agents for elastic fibers have been developed.
For example, Patent Document 1 describes an elastic fiber treatment agent containing a silicone resin (MQ resin), and Patent Document 2 contains a carboxamide-modified silicone to suppress aggregation and sedimentation of higher fatty acid magnesium salts. A treatment agent for elastic fibers is described. Patent Document 3 describes an elastic fiber treating agent having an average particle diameter of 0.01 to 5 μm and containing a needle-like metal salt of a higher fatty acid.

However, although the treatment agents for elastic fibers described in these prior arts are excellent in the anti-sticking property of fibers in the inner layer portion of the kite body, the kite yarn is reduced due to the fiber / fiber friction reducing action of the treating agent. In some cases, the outer layer portion of the body may be broken and a problem of unraveling such as twilling may occur.
Basically, the fiber anti-sticking property in the inner layer portion of the above-described threaded body and the anti-breaking property in the outer layer portion are in a trade-off relationship that if one is emphasized, the other deteriorates. In fact, it is desired to apply an elastic fiber treatment agent that satisfies both requirements.

Japanese Laid-Open Patent Publication No. 09-078460 Japanese Laid-Open Patent Publication No. 11-12950 Japanese Unexamined Patent Publication No. 2005-179874 Japanese Unexamined Patent Publication No. 2006-009221

Accordingly, an object of the present invention is to provide a treatment agent for elastic fibers that is excellent in both the fiber anti-sticking property in the inner layer portion of the string and the outer layer portion, and the elastic fiber provided with the treatment agent. There is to do.

In view of the above circumstances, the present inventors have intensively studied a processing agent for elastic fibers that can achieve both the fiber anti-sticking property in the inner layer portion of the thread body and the anti-breaking property in the outer layer portion. As a result, the present inventors have found that the above-mentioned problems can be solved by a treatment agent for elastic fibers containing a specific component (B).
That is, the elastic fiber treating agent of the present invention comprises at least one base component (A) selected from mineral oil (A1), silicone oil (A2) and ester oil (A3), and a basic alkaline earth metal. Component (B) which is a sulfonate.

The sulfonic acid constituting the component (B) is preferably an alkyl aromatic sulfonic acid having an average molecular weight of 350 g / mol to 700 g / mol.
The total base number of the component (B) is preferably 1 to 700 KOHmg / g.
The weight ratio of the component (B) to the treating agent is preferably 0.1 to 20% by weight.

The elastic fiber of the present invention is obtained by applying the treatment agent to an elastic fiber main body.

The elastic fiber to which the treatment agent for elastic fiber of the present invention is applied is excellent in both the fiber anti-sticking property in the inner layer portion of the thread body and the smashing preventing property in the outer layer portion.

The schematic diagram explaining the measuring method of a loop evaluation method. The schematic diagram explaining the measuring method of the friction between fibers.

The treatment agent for elastic fibers of the present invention is used when producing elastic fibers, and includes at least one base component (A) selected from mineral oil (A1), silicone oil (A2) and ester oil (A3). And a specific component (B). This will be described in detail below.

(Base component (A))
The base component (A) is at least one selected from mineral oil (A1), silicone oil (A2), and ester oil (A3). The base component (A) is an essential component for the elastic fiber treatment agent, and is an agent that reduces the friction between the fiber and the metal.

The weight ratio of the mineral oil (A1) to the treating agent is preferably 10% by weight or more, more preferably 15 to 85% by weight, and particularly preferably 20 to 80% by weight. If the mineral oil is less than 10% by weight, the solubility between the component (B) and the base component may be extremely lowered.

The weight ratio of the silicone oil (A2) to the treating agent is preferably 0 to 90% by weight, more preferably 15 to 85% by weight, and particularly preferably 20 to 80% by weight. When the amount of silicone oil is more than 90% by weight, the compatibility between the basic metal sulfonate (B) and the base component may be extremely lowered.

The mineral oil (A1) is not particularly limited, and examples thereof include machine oil, spindle oil, and liquid paraffin, and one or more kinds may be used. The viscosity of the mineral oil at 30 ° C. is preferably 30 seconds to 350 seconds, more preferably 35 seconds to 200 seconds, and even more preferably 40 seconds to 150 seconds. As the mineral oil, liquid paraffin is preferable because of low odor generation. When the viscosity of the mineral oil is less than 30 seconds, the quality of the obtained elastic fiber may be deteriorated. On the other hand, when the viscosity of the mineral oil exceeds 350 seconds, the solubility of other components blended in the treatment agent may deteriorate.

Although it does not specifically limit as a silicone oil (A2), Polydimethylsiloxane, polymethylphenylsiloxane, polymethylalkylsiloxane etc. can be mentioned, You may use 1 type (s) or 2 or more types. Viscosity at 25 ° C. of the silicone oil is preferably ² ~ 100mm 2 / s, more preferably 5 ~ 70mm ² / s, more preferably 5 ~ 50mm ² / s. When the viscosity is less than 2 mm ² / s, the silicone oil may volatilize, and when it exceeds 100 mm ² / s, the solubility of other components blended in the treatment agent may deteriorate. The average amount of siloxane bonds (SiOR ¹ R ² : R ¹ and R ² each independently represents an organic group) in the silicone oil is preferably 3 to 100, more preferably 7 to 60, and more preferably 7 to 50 Is more preferable. The organic group of R ¹ and R ² is a hydrocarbon group having 1 to 24 carbon atoms, and is a methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, pentyl group, isopentyl group, hexyl group, cyclohexane A propyl group, a cyclohexyl group, a phenyl group, a benzyl group and the like can be mentioned, and a methyl group and a phenyl group are particularly preferable.

The ester oil (A3) is not particularly limited, and examples thereof include esters produced from fatty acids and alcohols. As ester oil (A3), although the ester manufactured from the fatty acid and alcohol chosen from the following can be illustrated, for example, the ester which does not use the following fatty acid and alcohol as a raw material may be sufficient. The ester oil (A3) may be used alone or in combination of two or more.

The fatty acid is not particularly limited with respect to its carbon number, presence or absence of branching, valence, etc., and may be a higher fatty acid, a cyclic fatty acid, or a fatty acid containing an aromatic ring. Examples of the fatty acid include caprylic acid, 2-ethylhexylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachic acid, behenic acid, lignoselenic acid, adipic acid, and sebacic acid. And benzoic acid.

Alcohol is not particularly limited in terms of its carbon number, presence or absence of branching, valence, etc., and may be a higher alcohol, a cyclic alcohol, or an alcohol containing an aromatic ring. Examples of the alcohol include capryl alcohol, 2-ethylhexyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, ethylene glycol, hexanediol, glycerin, trimethylolpropane, Examples include pentaerythritol, sorbitol, sorbitan and the like.

Examples of the monovalent carboxylic acid include valeric acid, caproic acid, enanthic acid, caprylic acid, 2-ethylhexylic acid, capric acid, lauric acid, myristic acid, pentadecyl acid, palmitic acid, palmitoleic acid, margaric acid, stearic acid, olein Examples include acids, isostearic acid, vaccenic acid, linoleic acid, linolenic acid, arachidic acid, behenic acid, lignoceric acid, cetyrolic acid, and benzoic acid.

Specific examples of the ester oil (A3) include heptyl valerate, heptyl caproate, octyl caproate, cetyl caprylate, isooctyl laurate, isopropyl myristate, isopropyl palmitate, isostearyl palmitate, butyl stearate, stearic acid Examples include octyl, oleyl laurate, isotridecyl stearate, octyl stearate, isooctyl stearate, tridecyl stearate, isobutyl stearate, methyl oleate, isobutyl oleate, heptyl oleate, and oleyl oleate.

The viscosity (25 ° C.) of the ester oil (A3) is preferably 5 mm ² / s or more, more preferably 5 to 50 mm ² / s, and even more preferably 5 to 30 mm ² / s. If the viscosity (25 ° C.) is less than 5 mm ² / s, the yarn may swell, which is not preferable. The proportion of the ester oil (A3) in the entire base component is not particularly limited, but is preferably 50% by weight or less, more preferably 40% by weight or less, and further preferably 30% by weight or less. If the ester oil (A3) exceeds 50% by weight, the smoothness of the yarn may be insufficient.

(Ingredient (B))
Component (B) is a basic alkaline earth metal sulfonate.
Component (B) is a component that simultaneously exhibits two functions of preventing sticking and suppressing collapse in the inner layer portion of the elastic fiber string.
Component (B) is dissolved and dispersed in the base oil.

The component (B) is considered to prevent the sticking in the inner layer portion of the thread body because the component (B) is efficiently adsorbed on the surface of the elastic fiber and prevents direct contact between the elastic fibers. Although the reason why the component (B) is efficiently adsorbed on the surface of the elastic fiber is not clear, it is presumed that the component (B) is adsorbed on and coated on the surface of the elastic fiber because of its high polarity.

The obtaining method is not particularly limited, and it is possible to use a commercially available product as it is or to modify a part of the structure by reaction.

The weight ratio of the component (B) to the treating agent is preferably 0.01 to 20% by weight, more preferably 0.5 to 10.0% by weight, and particularly preferably 1.0 to 5.0% by weight. If the amount is less than 0.01% by weight, sufficient anti-sticking properties may not be obtained. If the amount exceeds 20% by weight, the viscosity of the treating agent will increase excessively, and elastic fibers will run in the spinning and post-processing steps. When doing so, there is a case where the thread is wound around the traveling roller due to adhesiveness, and the thread breakage may occur.

The sulfonic acid constituting the component (B) is preferably an alkyl aromatic sulfonic acid.
The average molecular weight of the alkyl aromatic sulfonic acid is preferably 350 to 700 g / mol, more preferably 400 to 600 g / mol. When the molecular weight of the alkyl aromatic sulfonic acid is out of the range of 350 g / mol to 700 g / mol, the compatibility with the treatment agent is poor, the stability may be impaired, and sufficient uniform unwinding property cannot be obtained. Sometimes.

Examples of the alkyl aromatic sulfonic acid include so-called petroleum sulfonic acid and synthetic sulfonic acid. As petroleum sulfonic acid here, what sulfonated the alkyl aromatic compound of the lubricating oil fraction of mineral oil, what is called mahoganic acid etc. byproduced at the time of white oil manufacture are mentioned. In addition, as an example of synthetic sulfonic acid, linear or branched alkyl obtained by recovering a by-product in an alkylbenzene production plant that is a raw material of a detergent or by alkylating benzene with polyolefin Examples include sulfonated alkylbenzene having a group. Another example of the synthetic sulfonic acid is a sulfonated alkyl naphthalene such as dinonylnaphthalene. Moreover, there is no restriction | limiting in particular as a sulfonating agent at the time of sulfonating these alkyl aromatic compounds, For example, fuming sulfuric acid and anhydrous sulfuric acid can be used.

The term “basic” indicates that the sulfonic acid salt contains an alkaline earth metal in excess of the amount necessary to react with the sulfonic acid and the alkaline earth metal to form a salt. The total base number of component (B) is preferably 1 to 700 KOH mg / g, more preferably 1 to 650 KOH mg / g, and particularly preferably 10 to 600 KOH mg / g. When the total base number of component (B) is greater than 700 KOH mg / g, the compatibility with the treatment agent may deteriorate and stability may be impaired. When the total base number is less than 1, sufficient agglutination Prevention may not be obtained.

Examples of the alkaline earth metal include magnesium, barium, calcium, strontium, beryllium and the like, and magnesium, barium or calcium is preferable.
The component (B) may be basified with a carbonate (for example, an alkaline earth metal carbonate such as calcium carbonate or magnesium carbonate), or an alkali such as a borate (for example, calcium borate or magnesium borate). It may be basified with an earth metal borate.).
A method for obtaining a metal sulfonate basified with a carbonate is not particularly limited. For example, a metal base (for example, a metal hydroxide or an oxide) of a metal sulfonate in the presence of carbon dioxide gas. It can obtain by making it react.
A method for obtaining a metal sulfonate basified with a borate is not particularly limited, but a neutral salt of a metal sulfonate in the presence of boric acid or boric anhydride or borate is converted to a metal base (for example, It can be obtained by reacting with a metal hydroxide, oxide, etc.).

(Other ingredients)
In addition to the components described above, the treatment agent for elastic fibers of the present invention has an alkyl-modified silicone, an ester-modified silicone, a polyether-modified silicone, an amino-modified silicone, a carbite in addition to the components described above. Nord-modified silicone, epoxy-modified silicone, carboxy-modified silicone, and mercapto-modified silicone, silicone resin (C), higher fatty acid metal salt (D), nonionic surfactant, cationic surfactant, or anionic surfactant One kind of other components may be further contained. One or more other components may be used.

The modified silicone is generally a reactive (functional) group or non-reactive at at least one of both ends, one end, side chain, and both side chains of a polysiloxane such as dimethyl silicone (polydimethylsiloxane). It has a structure in which at least one (functional) group is bonded.

More specifically, the modified silicone is an alkyl-modified silicone such as a modified silicone having a long-chain alkyl group (such as an alkyl group having 6 or more carbon atoms or a 2-phenylpropyl group); an ester that is a modified silicone having an ester bond. Modified silicones; polyether-modified silicones that are modified silicones having polyoxyalkylene groups (for example, polyoxyethylene groups, polyoxypropylene groups, polyoxyethyleneoxypropylene groups, etc.); aminopropyl groups and N- (2-amino) Ethyl) modified silicone having aminopropyl group, etc., amino modified silicone; modified carbinol modified silicone having alcoholic hydroxyl group; modified silicone having epoxy group such as glycidyl group or alicyclic epoxy group Epoxy-modified silicone: can be mentioned a mercapto-modified silicone is a modified silicone having a mercapto group; a carboxyl group carboxyl-modified silicone is a modified silicone having a.

The silicone resin (C) is an organopolysiloxane resin and means a silicone having a three-dimensional crosslinked structure. The silicone resin is generally at least one component selected from a monofunctional constituent unit (M), a bifunctional constituent unit (D), a trifunctional constituent unit (T), and a tetrafunctional constituent unit (Q). It consists of units.

Although it does not specifically limit as said silicone resin, For example, silicone resins, such as MQ silicone resin, MQT silicone resin, T silicone resin, DT silicone resin, etc. can be mentioned, 1 type or 2 types or more of these are mentioned. You may use together.

Examples of the MQ silicone resin include R ^a R ^b R ^c SiO _1/2 that is ^a monofunctional structural unit (provided that R ^a, R ^b, and R ^c are all hydrocarbon groups) and 4 Examples thereof include a silicone resin containing SiO _4/2 which is a functional constituent unit.

Examples of the MQT silicone resin include R ^a R ^b R ^c SiO _1/2 that is ^a monofunctional structural unit (provided that R ^a , R ^b, and R ^c are all hydrocarbon groups), and 4 Examples thereof include a silicone resin containing SiO _{4/2 which} is a functional structural unit and RSiO _3/2 which is a trifunctional structural unit (where R is a hydrocarbon group).

Examples of the T-silicone resin include a silicone resin containing RSiO _3/2 (where R is a hydrocarbon group) which is a trifunctional structural unit (the end of which is a hydrocarbon group, silanol group or alkoxy group). And may be a base).

Examples of the DT silicone resin include R ^a R ^b SiO _2/2 which is ^a bifunctional structural unit (wherein R ^a and R ^b are both hydrocarbon groups) and a trifunctional structural unit. RSiO _3/2 (wherein R is a hydrocarbon group).

The hydrocarbon group for R, R ^a , R ^b and R ^{c is} a hydrocarbon group having 1 to 24 carbon atoms, such as a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a pentyl group, An isopentyl group, a hexyl group, a cyclopropyl group, a cyclohexyl group, a phenyl group, a benzyl group and the like can be mentioned, and a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a phenyl group are particularly preferable.

When the silicone resin (C) is contained, the blending ratio of the silicone resin (C) to the entire treating agent is preferably 0.1 to 9, more preferably 0.2 to 5, and further preferably 0.3 to 3. When the said mixture ratio is less than 0.1, the improvement effect of anti-sticking by addition of silicone resin (C) may not fully be acquired. When the blending ratio is greater than 9, the anti-sticking property is excellent, but the outer layer portion may be easily broken.

Examples of the higher fatty acid metal salt (D) include divalent or trivalent metal salts of fatty acids having 8 to 22 carbon atoms. Examples of the higher fatty acid metal salt (D) include calcium laurate, calcium palmitate, barium myristate, magnesium palmitate, magnesium laurate, magnesium myristate, magnesium stearate, magnesium 2-ethylhexylate, zinc behenate, tribehenine Examples thereof include aluminum oxide, calcium stearate, calcium 2-ethylhexylate, aluminum stearate, aluminum palmitate, barium stearate, zinc caprate, and zinc stearate.

The average particle diameter of the higher fatty acid metal salt (D) is not particularly limited, but is preferably 0.01 to 5 μm, more preferably 0.02 to 3 μm, and particularly preferably 0.05 to 2 μm. When the average particle size of the higher fatty acid metal salt (D) is less than 0.01 μm, the effect of addition may not be observed. On the other hand, if the average particle diameter of the higher fatty acid metal salt (D) is more than 5 μm, it may easily fall off from the fiber surface and may cause scum in the post-spinning process.

The shape of the higher fatty acid metal salt (D) is not particularly limited, but a needle shape is preferable. When the shape of the higher fatty acid metal salt is needle-shaped, the ratio between the vertical direction and the horizontal direction is preferably 10: 1 to 2: 1 and more preferably 8: 1 to 3: 1 from the viewpoint of unraveling property. .

The nonionic surfactant is not particularly limited, and examples thereof include polyoxyethylene alkyl ether having 1 to 20 carbon atoms (EO1 to 20 mol) and polyoxypropylene having 8 to 22 carbon atoms. Alkyl ether (PO1-20 mol), sorbitan fatty acid ester, EO adduct of sorbitan fatty acid ester (EO1-20 mol), PO adduct of sorbitan fatty acid ester (PO1-20 mol), alkyl group having 6-22 carbon atoms EO adducts of alkylphenols having alkyl groups having 6 to 22 carbon atoms (EO 1 to 20 mol), fatty acid polyoxyethylene glycol esters (EO 1 to 20 mol), fatty acid polyoxypropylene glycol esters (PO 1 to 20 mol) Etc. .

The cationic surfactant is not particularly limited, and examples thereof include alkylamines such as primary amines, secondary amines and tertiary amines or salts thereof, and quaternary ammonium salts. Specifically, laurylamine, myristylamine, cetylamine, stearylamine, oleylamine, diethylamine, dioctylamine, distearylamine, methylstearylamine, polyoxypropylene-added laurylamine, polyoxyethylene-added laurylamine, polyoxyethylene-added stearyl Amine, polyoxyethylene-added oleylamine, monoethanolamine, diethylethanolamine, dibutylethanolamine, triethanolamine, laurylethanolamine, oleylpropylenediamine, trioctylamine, dimethyllaurylamine, dimethylmyristylamine, dimethylstearylamine, didecyl Dimethylammonium salt, decyltrimethylammonium salt, dioctyldimethylammonium Salt, octyl trimethyl ammonium salts and the like.

The anionic surfactant is not particularly limited. For example, alkane sulfonic acid, dialkyl sulfosuccinic acid, alkyl benzene sulfonic acid, alkyl naphthalene sulfonic acid, alkyl sulfuric acid, polyoxyethylene alkyl ether sulfuric acid, alkyl phosphoric acid, polyoxyethylene alkyl There are ether phosphoric acids, or salts of these components, alkyl carboxylic acids, polyoxyethylene alkyl carboxylic acids, or salts of these components. Specifically, an alkanesulfonic acid having an alkyl group having 6 to 22 carbon atoms and / or an alkali metal salt thereof, a dialkylsulfosuccinic acid having an alkyl group having 6 to 22 carbon atoms and / or an alkali metal salt thereof, Alkylbenzenesulfonic acid having an alkyl group of ˜22 and / or alkali metal salt thereof, alkylsulfuric acid having an alkyl group of 1 to 20 carbon atoms and / or salt thereof, polyoxyethylene alkyl having an alkyl group of 6 to 22 carbon atoms Ether sulfuric acid and / or salt thereof, alkyl phosphoric acid having an alkyl group having 6 to 22 carbon atoms, alkali metal salt and / or alkaline earth metal salt of alkyl phosphoric acid having an alkyl group having 6 to 22 carbon atoms, carbon number Polyoxyethylene alkyl ether phosphoric acid having an alkyl group of 6 to 22, carbon number Alkali metal salt and / or alkaline earth metal salt of polyoxyethylene alkyl ether phosphoric acid having ˜22 alkyl group, alkyl carboxylic acid having alkyl group having 6 to 22 carbon atoms, alkyl having 6 to 22 carbon atoms Examples thereof include alkali metal salts and / or alkaline earth metal salts of polyoxyethylene alkyl ether carboxylic acids having a group. Among the above-mentioned anionic surfactants, inclusion of alkyl phosphoric acid, polyoxyethylene alkyl ether phosphoric acid, or salts of these components may be preferable because the performance balance between smoothness and unwinding properties is improved.

[Treatment agent for elastic fibers]
The viscosity of the elastic fiber treating agent of the present invention at 30 ° C. is preferably 5 to 50 mm ² / s, more preferably 5 to 40 mm ² / s, and still more preferably 6 to 20 mm ² / s. If the viscosity is too low, when the elastic fiber is run in the spinning and post-processing steps, the treatment agent may scatter in the form of a mist, and the surroundings may be soiled or the operator may inhale. On the other hand, if the viscosity is too high, when the elastic fiber is run in the spinning and post-processing steps, the running roller may wind the yarn around the running roller due to adhesiveness, which may cause yarn breakage.

The method for producing the treatment agent for elastic fiber of the present invention is not particularly limited, and a known method can be adopted. For example, a method in which some components are blended in advance and mixed with other components may be used, or a method in which all components are mixed at once. Further, when the treatment agent for elastic fibers of the present invention contains a higher fatty acid metal salt, it may be produced by mixing an already pulverized higher fatty acid metal salt with a base component or the like. May be mixed and pulverized to a predetermined average particle size using a conventionally known wet pulverizer.

The weight ratio of the base component (A) to the elastic fiber treating agent is preferably 50 to 99.99% by weight, more preferably 55 to 99.9% by weight, still more preferably 60 to 99% by weight, and 65 to 98% by weight. % Is particularly preferred. If the proportion of the base component (A) is too small, the smoothness is lowered and the quality of the fabric product may be lowered.

When the elastic fiber treatment agent contains other components, the weight ratio of the other components to the entire elastic fiber treatment agent is preferably 0.01 to from the viewpoint of maintaining fluidity when using the treatment agent. It is preferably 15% by weight, more preferably 0.1 to 13% by weight, still more preferably 0.5 to 10% by weight.

[Elastic fiber]
The elastic fiber of the present invention is obtained by applying the elastic fiber treatment agent of the present invention to an elastic fiber main body. The adhesion ratio of the elastic fiber treatment agent to the entire elastic fiber is not particularly limited, but is preferably 0.1 to 15% by weight, and more preferably 0.5 to 10% by weight. The method for applying the elastic fiber treatment agent of the present invention to the elastic fiber body is not particularly limited, and a known method can be employed.

The elastic fiber (elastic fiber body) of the present invention is a fiber having elasticity using polyether polyurethane, polyester polyurethane, polyether ester elastomer, polyester elastomer, polyethylene elastomer, polyamide elastomer, etc., and its elongation is usually 300% or more.

The elastic fiber of the present invention is made of polyurethane or polyurethane urea obtained by reacting PTMG or polyester diol with an organic diisocyanate and then extending the chain with 1,4 butanediol, ethylenediamine, propylenediamine, pentanediamine or the like. Can be mentioned. For example, polyurethane urea elastic fiber is prepared with polytetramethylene glycol (PTMG) having a molecular weight of 1000 to 3000 and diphenylmethane diisocyanate (MDI), and dimethyl at PTMG / MDI = 1/2 to 1 / 1.5 (molar ratio). A 20 to 40% solution of a polyurethane urea polymer obtained by reacting in a solvent such as acetamide or dimethylformamide and chain-extending with a diamine such as ethylenediamine or propanediamine is spin-spun at a spinning speed of 400 to 1200 m / min. Can be manufactured. The adaptive fineness of the elastic fiber body is not particularly limited.

The elastic fiber body of the present invention may contain inorganic substances such as titanium oxide, magnesium oxide, hydrotalcite, zinc oxide, and divalent metal soap. Divalent metal soaps include calcium 2-ethylhexylate, calcium stearate, calcium palmitate, magnesium stearate, magnesium palmitate, magnesium laurate, barium stearate, zinc caprate, zinc behenate, zinc stearate, etc. Can be mentioned. 1 type (s) or 2 or more types may be used for an inorganic substance.

When the elastic fiber body contains an inorganic substance, the uniform unwinding property may be poor, but the uniform unwinding property can be improved by applying the treatment agent of the present invention to the elastic fiber body. Therefore, the processing agent for elastic fibers of the present invention can be suitably used when the elastic fiber main body contains an inorganic substance. The content of the inorganic substance in the elastic fiber body is not particularly limited, but is preferably 0.01 to 5% by weight, more preferably 0.1 to 3% by weight.

As an application of the elastic fiber of the present invention, it can be used as a cloth by processing yarn such as covering yarn such as CSY, single covering, PLY, air covering, circular knitting, tricot and the like. In addition, using these processed yarns and fabrics, products that require elasticity such as stockings, socks, underwear and swimwear, and outerwear such as jeans and suits are given elasticity for comfort. Also used for purposes. More recently, it has been applied to disposable diapers.

Hereinafter, the present invention will be specifically described by way of examples and comparative examples, but the present invention is not limited to the examples described herein. Note that “percent (%)” and “parts” shown in the following examples indicate “% by weight” and “parts by weight” unless otherwise specified. In Examples and Comparative Examples, evaluation of each characteristic of the elastic fiber treatment agent was performed according to the following method.

(Unwinding speed ratio)
In FIG. 1, the cheese (1) of the fiber which gave the processing agent to the unwinding side of the unwinding speed ratio measuring machine is set, and the winding side paper tube (2) is set. After setting the winding speed to a constant speed, the rollers (3) and (4) are started simultaneously. In this state, there is almost no tension on the yarn (5), so the yarn does not get stuck on the cheese and the unwinding point (6) is in the state shown in FIG. By changing the unwinding speed, the unwinding point (6) of the yarn (5) from the cheese is changed, and the unwinding speed is set so that this point coincides with the contact point (7) between the cheese and the roller. The unraveling speed ratio is obtained by the following equation (1). The smaller this value is, the better the unpacking property is.
Unwinding speed ratio (%) = ((winding speed−unwinding speed) / unwinding speed) × 100 (1)
The unwinding speed ratio after the lapse of time indicates the unwinding speed ratio after the lapse of 6 months under the condition of 20 ° C. and 65% RH.

(Friction coefficient between fibers (F / FμS))
In FIG. 3, a polyurethane elastic fiber monofilament to which a treatment agent is applied is taken about 50 to 60 cm, a load T1 (20) is suspended at one end, and the other is attached to a U gauge (18) via a roller (19). Is pulled at a constant speed (for example, 3 cm / min), the secondary tension T2 at that time is measured with a U gauge (18), and the inter-fiber friction coefficient is obtained by the following equation (2).
Friction coefficient (F / FμS) = 1 / θ · ln (T2 / T1) Equation (2)
(In the formula (2), θ = 2π, ln = natural logarithm, T1 is 1 g per 22 dtex)

(index)
(Anti-sticking property)
○: When the unwinding speed ratio of the inner layer is less than 100.
X: When the unwinding speed ratio of the inner layer part is 100 or more.
(Anti-cracking prevention)
○: The unwinding speed ratio of the outer layer portion is 20 or more, and the inter-fiber friction coefficient is 0.22 or more.
X: The unwinding speed ratio of the outer layer portion is less than 20, or the inter-fiber friction coefficient is less than 0.22.

[Examples 1 to 11 and Comparative Examples 1 to 13]
(Adjustment of spinning dope)
A polytetramethylene ether glycol having a number average molecular weight of 2000 and 4,4′-diphenylmethane diisocyanate were reacted at a molar ratio of 1: 2, followed by chain extension using a dimethylformamide solution of 1,2-diaminopropane, and a polymer concentration of 27%. Of dimethylformamide was obtained. The concentration at 30 ° C. was 1500 mPaS.

The polyurethane spinning dope was discharged into a 190 ° C. N ₂ stream and dry-spun. 6% by weight of the treatment agent shown in Table 2 and Table 3 (mixed in parts by weight in the table) prepared on the running yarn during spinning using the components shown in Table 2 and Table 3 is applied to the fiber by the oiling roller. After that, it was wound around a bobbin at a speed of 500 m / min to obtain 44 dtex monofilament cheese (rolling amount 400 g). The obtained cheese was left for 48 hours in an atmosphere of 35 ° C. and 50% RH for evaluation. The evaluation results of the oil agent performance are shown in Tables 2 and 3. In addition, the used component in Table 1 and Table 2 is as follows.
Regarding the method for measuring the total base number of the basic metal sulfonate component (B), first, the basic metal sulfonate component (B) is separated from the treating agent by the rubber membrane dialysis method, and the separated basic metal sulfonate component ( For B), the total base number was measured by JIS K2501 (hydrochloric acid method).
The average molecular weight was measured by liquid chromatography mass spectrometry (LC / MS).
(Ingredient (A))
Liquid paraffin 60 seconds: Cosmo Pure Safety 10 (manufactured by Cosmo Oil Co., Ltd.)
Dimethyl silicone 10 mm ² / s: DOW CORNING TORAY SH200 FLUID 10 CS (manufactured by Toray Dow Corning)
(Ingredient (B))
Basic Ba petroleum sulfonate (total base number = 9 KOH mg / g, average molecular weight of sulfonic acid compound = 392 g / mol, alkyl aromatic sulfonate)
Basic Ca petroleum sulfonate (total base number = 23 KOH mg / g, average molecular weight of sulfonic acid compound = 510 g / mol, alkyl aromatic sulfonate)
Basic Mg petroleum sulfonate (total base number = 612 KOH mg / g, average molecular weight of sulfonic acid compound = 654 g / mol, alkyl aromatic sulfonate)
(Ingredient (C))
Silicone resin (MQ resin) (500 mm ² / s (25 ° C.))
Silicone resin (T resin) (300mm ² / s (25 ° C))
(Component (D))
Magnesium stearate: average particle size 0.5 μm, needle shape (1: 5)
(Other ingredients)
Neutral Na dodecylbenzenesulfonate (total base number = 0 KOHmg / g, molecular weight of sulfonic acid compound = 324 g / mol, alkyl aromatic sulfonate)
Neutral Ca dodecylbenzenesulfonate (total base number = 0 KOHmg / g, molecular weight of sulfonic acid compound = 324 g / mol, alkyl aromatic sulfonate)
Neutral NaC15 alkanesulfonate (total base number = 0 KOHmg / g, molecular weight of sulfonic acid compound = 262 g / mol, non-alkyl aromatic sulfonate)
Isostearyl alcohol: Fine oxocol 180T (manufactured by Nissan Chemical Industries)
Isostearyl phosphate ester isotridecyl phosphate ester polyoxyethylene (3) mol addition dodecanol amino-modified silicone (70 mm ² / s (25 ° C.))

As can be seen from Tables 1 to 3, in Examples 1 to 11, at least one base component (A) selected from mineral oil (A1), silicone oil (A2) and ester oil (A3), and basic Since the processing agent for elastic fibers containing the component (B) which is an alkaline earth metal sulfonate is used, it is excellent in the fiber anti-sticking property in the inner layer portion of the thread body and in the anti-breaking property in the outer layer portion.
In the case of Comparative Examples 1 to 13, the unraveling speed ratio of the inner layer portion of the cheese is large, the inner / outer layer difference is large and the uniform unraveling property is insufficient, and the inter-fiber friction coefficient is small. Either the fiber anti-sticking property in the inner layer part of a certain thread body or the crack preventing property in the outer layer part cannot be solved. For Comparative Examples 9 to 13, the sulfonate anionic surfactant described in Patent Document 4 is used, but all are neutral metal sulfonates, and the component (B) is not used. The difference is large and the uniform resolution is insufficient.

1 cheese 2 winding paper tube 3 roller 4 roller 5 traveling yarn 6 unwinding point 7 cheese and roller contact 8 U gauge 9 roller 10 load

Claims

Elasticity comprising at least one base component (A) selected from mineral oil (A1), silicone oil (A2) and ester oil (A3), and component (B) which is a basic alkaline earth metal sulfonate Treatment agent for textiles.
2. The elastic fiber treating agent according to claim 1, wherein the sulfonic acid constituting the component (B) is an alkyl aromatic sulfonic acid having an average molecular weight of 350 g / mol to 700 g / mol.
The elastic fiber treating agent according to claim 1 or 2, wherein the total base number of the component (B) is 1 to 700 KOHmg / g.
The elastic fiber treatment agent according to any one of claims 1 to 3, wherein a weight ratio of the component (B) to the treatment agent is 0.1 to 20% by weight.
An elastic fiber obtained by applying the treatment agent according to any one of claims 1 to 4 to an elastic fiber main body.